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NM_002693.3(POLG):c.2265+1G>A AND Progressive sclerosing poliodystrophy

Germline classification:
Likely pathogenic (1 submission)
Last evaluated:
Oct 13, 2023
Review status:
1 star out of maximum of 4 stars
criteria provided, single submitter
Somatic classification
of clinical impact:
None
Review status:
(0/4) 0 stars out of maximum of 4 stars
no assertion criteria provided
Somatic classification
of oncogenicity:
None
Review status:
(0/4) 0 stars out of maximum of 4 stars
no assertion criteria provided
Record status:
current
Accession:
RCV002571546.2

Allele description [Variation Report for NM_002693.3(POLG):c.2265+1G>A]

NM_002693.3(POLG):c.2265+1G>A

Gene:
POLG:DNA polymerase gamma, catalytic subunit [Gene - OMIM - HGNC]
Variant type:
single nucleotide variant
Cytogenetic location:
15q26.1
Genomic location:
Preferred name:
NM_002693.3(POLG):c.2265+1G>A
HGVS:
  • NC_000015.10:g.89323403C>T
  • NG_008218.2:g.16393G>A
  • NM_001126131.2:c.2265+1G>A
  • NM_002693.3:c.2265+1G>AMANE SELECT
  • LRG_765t1:c.2265+1G>A
  • LRG_765:g.16393G>A
  • NC_000015.9:g.89866634C>T
  • NM_002693.2:c.2265+1G>A
Molecular consequence:
  • NM_001126131.2:c.2265+1G>A - splice donor variant - [Sequence Ontology: SO:0001575]
  • NM_002693.3:c.2265+1G>A - splice donor variant - [Sequence Ontology: SO:0001575]

Condition(s)

Name:
Progressive sclerosing poliodystrophy (MTDPS4A)
Synonyms:
Alpers disease; Alpers diffuse degeneration of cerebral gray matter with hepatic cirrhosis; Alpers progressive infantile poliodystrophy; See all synonyms [MedGen]
Identifiers:
MONDO: MONDO:0008758; MedGen: C0205710; Orphanet: 726; OMIM: 203700

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Assertion and evidence details

Help
Submission AccessionSubmitterReview Status
(Assertion method)		Clinical Significance
(Last evaluated)		OriginMethodCitations
SCV003326502Invitae
criteria provided, single submitter

(Invitae Variant Classification Sherloc (09022015))		Likely pathogenic
(Oct 13, 2023) 		germlineclinical testing

PubMed (3)
[See all records that cite these PMIDs]

Help

Summary from all submissions

EthnicityOriginAffectedIndividualsFamiliesChromosomes testedNumber TestedFamily historyMethod
not providedgermlineunknownnot providednot providednot providednot providednot providedclinical testing

Citations

PubMed

Splicing in action: assessing disease causing sequence changes.

Baralle D, Baralle M.

J Med Genet. 2005 Oct;42(10):737-48. Review.

PubMed [citation]
PMID:
16199547
PMCID:
PMC1735933

Molecular and clinical genetics of mitochondrial diseases due to POLG mutations.

Wong LJ, Naviaux RK, Brunetti-Pierri N, Zhang Q, Schmitt ES, Truong C, Milone M, Cohen BH, Wical B, Ganesh J, Basinger AA, Burton BK, Swoboda K, Gilbert DL, Vanderver A, Saneto RP, Maranda B, Arnold G, Abdenur JE, Waters PJ, Copeland WC.

Hum Mutat. 2008 Sep;29(9):E150-72. doi: 10.1002/humu.20824.

PubMed [citation]
PMID:
18546365
PMCID:
PMC2891192
See all PubMed Citations (3)

Details of each submission

From Invitae, SCV003326502.2

#EthnicityIndividualsChromosomes TestedFamily HistoryMethodCitations
1not providednot providednot providednot providedclinical testing PubMed (3)

Description

This sequence change affects a donor splice site in intron 13 of the POLG gene. It is expected to disrupt RNA splicing. Variants that disrupt the donor or acceptor splice site typically lead to a loss of protein function (PMID: 16199547), and loss-of-function variants in POLG are known to be pathogenic (PMID: 18546365). This variant is not present in population databases (gnomAD no frequency). This variant has not been reported in the literature in individuals affected with POLG-related conditions. ClinVar contains an entry for this variant (Variation ID: 1807554). Algorithms developed to predict the effect of sequence changes on RNA splicing suggest that this variant may disrupt the consensus splice site. In summary, the currently available evidence indicates that the variant is pathogenic, but additional data are needed to prove that conclusively. Therefore, this variant has been classified as Likely Pathogenic.

#SampleMethodObservation
OriginAffectedNumber testedTissuePurposeMethodIndividualsAllele frequencyFamiliesCo-occurrences
1germlineunknownnot providednot providednot providednot providednot providednot providednot provided

Last Updated: Sep 16, 2024